13 results about "Blue phase liquid crystal" patented technology

The present application relates to the technical field of mechanochromic materials, and discloses a blue-phase liquid crystal polymer fiber that changes color in response to mechanical force, and its preparation method and application. The blue-phase liquid crystal polymer fiber that changes color in response to mechanical force has a skin-core structure, wherein the skin layer is a blue-phase liquid crystal layer, and the core layer is a polymer fiber monofilament; the blue-phase liquid crystal polymer fiber can change color in response to stress changes. When an external force is applied to the blue-phase liquid crystal polymer fiber of the present application, the lattice constant of the blue-phase liquid crystal changes, thereby causing the reflection wavelength to change color. Because it has a stable polymer network structure, it has reversible color change behavior; the preparation method of the present application is simple, and a blue-phase structure with a good lattice structure and large plates can be obtained by rapid cooling; the prepared blue-phase liquid crystal polymer fiber has good processability and high performance, and has very good application potential in the fields of sensors, displays, stealth and anti-counterfeiting.

In some embodiments, wavefront engineered contact / scleral / intraocular lenses correct presbyopia and / or astigmatism. Some aspects relate to apparatuses including structures doped with certain nanoparticles to enhance alignment of liquid crystal materials. Some embodiments relate to tunable optical lenses for vision correction that have a structure with doped nanoparticles in the liquid crystal layer and alignment layer or only with blue phase liquid crystal layer without any alignment layer.

The application discloses a kind of light field multidimensional modulation devices, preparation method and its application.The device includes first substrate, second substrate, first electrode layer, second electrode layer, first orientation layer, second orientation layer and blue phase liquid crystal layer;Blue phase liquid crystal layer includes liquid crystal and polymer mixed layer, wherein rod-shaped liquid crystal molecules form double helix twist prisms, the chirality of prisms determines the polarization of modulated light field;Double helix twist prisms are three-dimensionally packed to form cubic lattice structure, and the lattice constant of cubic lattice structure corresponds to determine the wavelength of modulated light field, and the crystal face orientation angle of cubic lattice structure determines the phase of modulated light field.The application realizes the efficient modulation of blue phase liquid crystal to light field polarization, wavelength, phase and intensity by flexible control to multi-level, cross-scale structure, provides the feasibility of optical multidimensional independent control, can be applied to optical computing, optical communication, hyperspectral imaging, color holographic display and other fields, and promotes the development of existing optical system.

The present application relates to the technical field of liquid crystal display, and particularly relates to a reflective blue phase liquid crystal display panel and a preparation method thereof. The reflective blue phase liquid crystal display panel comprises a glass packaging layer, an orientation layer, a blue phase liquid crystal layer, an electrode layer, a substrate layer, an optical absorption layer, and spacers uniformly distributed between the glass packaging layer and the substrate layer, and the orientation layer is provided with a step structure layer; the blue phase liquid crystal layer is filled with a single blue phase liquid crystal material to form, and the crystal face orientation of the blue phase liquid crystal layer is jointly determined by the surface anchoring free energy of the orientation layer and the thickness difference of the step structure layer. The present application is based on the growth of the blue phase liquid crystal induced by the patterned orientation surface, can effectively reduce the surface free energy and reduce the lattice structure defects, and improve the optical properties of the blue phase liquid crystal; meanwhile, by utilizing the difference of the Bragg reflection of different lattices of the same blue phase liquid crystal material, red, green and blue three primary colors can be obtained, and the process steps of preparing three primary colors by using three materials in general blue phase liquid crystal display devices can be simplified.

The invention relates to the technical field of liquid crystal lenses, in particular to a dual-electrode-layer blue-phase liquid crystal lens device and a focusing method.The dual-electrode-layer blue-phase liquid crystal lens device comprises an upper glass substrate, a grounding electrode layer, a blue-phase liquid crystal layer, a high dielectric layer, a first driving electrode layer, a second driving electrode layer and a lower glass substrate which are sequentially arranged; the gap between the adjacent first driving electrodes is equal to the width of the second driving electrodes, and the first driving electrodes and the second driving electrodes are arranged in a staggered mode. The invention also relates to a focusing method which comprises the following steps: S1, applying a driving voltage which is gradually reduced from the edge of the lens to the center of the lens to the first driving electrode layer and the second driving electrode layer; s2, the driving voltage is transmitted to the blue phase liquid crystal layer to form a vertical electric field; s3, the blue phase liquid crystal layer forms refractive index gradient distribution; and S4, adjusting the driving voltage to change the refractive index distribution of the blue phase liquid crystal layer. According to the invention, the abnormal projection of local refractive index is effectively inhibited, so that the refractive index distribution is closer to an ideal curve.

The invention discloses a method for preparing a blue-phase liquid crystal microcosmic patterned array and application of the blue-phase liquid crystal microcosmic patterned array. The method comprises the following steps of: providing a polydimethylsiloxane film with grooves in a required pattern shape; under a heating condition, at least applying a liquid crystal solution into the groove, and cooling until a stable BPI structure is formed; and carrying out ultraviolet irradiation polymerization to obtain the blue-phase liquid crystal microcosmic patterned array. According to the method, high-quality patterning of blue-phase liquid crystals, especially high-quality patterning in a microscopic state, is realized.

This invention relates to the field of lenses, specifically to a position-modulable liquid crystal lens based on the principle of electric field superposition. The structure of this invention, from top to bottom, consists of an upper substrate, a liquid crystal layer, a dielectric layer, an electrode layer, and a lower substrate. The liquid crystal layer uses polymer-stabilized blue phase liquid crystal, and the electric field within it is a transverse electric field. According to the Kerr effect and related principles, it can achieve a larger refractive index difference. This invention achieves a transverse electric field in the liquid crystal layer through the principle of electric field superposition; that is, the transverse electric fields between pairs of electrodes are superimposed and enhanced, while the longitudinal electric fields are superimposed and canceled out. This allows for the realization of a transverse electric field in a liquid crystal lens with a single-layer planar electrode architecture, reducing the etching depth of the electrode structure. Furthermore, this invention modulates the sinusoidal driving voltage applied to the electrodes, achieving a transverse shift in the lens's refractive index distribution. The minimum precision of this transverse shift is the distance between two adjacent electrodes, thus enabling precise adjustment of the liquid crystal lens's position.

The invention discloses double-chiral blue-phase liquid crystal photon paper as well as a preparation method and application thereof. The photon paper structurally comprises a first substrate, a first blue phase liquid crystal polymer template and a second blue phase liquid crystal polymer template, wherein the first blue phase liquid crystal polymer template and the second blue phase liquid crystal polymer template are sequentially arranged on the first substrate from bottom to top; wherein the first blue-phase liquid crystal polymer template and the second blue-phase liquid crystal polymer template have opposite chirality. Patterns written or printed on the photon paper can reflect left-handed light and right-handed light at the same time, the light in different rotation directions contains different color information and color change rates, and the polarization anti-counterfeiting and information encryption effects are achieved.

The invention belongs to the technical field of infrared stealth protection materials, and provides an infrared stealth composite thin film material capable of being dynamically adjusted at multiple temperatures and a preparation method of the infrared stealth composite thin film material. The preparation method comprises the following steps: firstly, modifying boron nitride by using an MOF material, and compounding the modified boron nitride and microencapsulated blue-phase liquid crystal into VO2 (M) aerogel to prepare composite aerogel; preparing a doped bismuth antimonide film through a co-sputtering method; and finally, coating the bismuth antimonide doped film with the composite aerogel, and drying and curing to obtain the bismuth antimonide doped film. The infrared emissivity of the infrared stealth composite film material is 43% at a low temperature, 40%-58% at a normal temperature and 51% at a high temperature, the temperature response time is 1-3 seconds, and the working temperature range is-30-150 DEG C; the infrared emissivity and the reflectivity are dynamically adjusted at different temperatures, and the coating has certain durability and can be applied to infrared stealth protection of carrying tools.

The present invention discloses the application of fluorosilane in the preparation of blue phase liquid crystal photonic paper materials. In the present invention, the blue phase liquid crystal polymer template film is treated with fluorosilane, which can effectively reduce the surface energy of the blue phase liquid crystal polymer template film, inhibit the lateral spreading of ink droplets after printing, and delay the longitudinal penetration of ink, thereby preventing the occurrence of droplet aggregation during ink printing, thereby preventing the problems of uneven color and blurred boundaries. The blue phase liquid crystal photonic paper material prepared by the present invention can improve printing accuracy, so that the minimum single point of printing can reach 51±14μm, and can achieve clear printing of multi-color patterns by adjusting the volume of printed ink. The raw materials of the present invention are widely available, the hydrophobic treatment process is simple and easy, and it has good applicability.

The invention discloses a blue-phase liquid crystal quantum dot hybrid film and a preparation method thereof, and belongs to the technical field of flexible liquid crystal display, and a used liquid crystal composite system comprises micromolecular nematic liquid crystal, a chiral agent, a polymerizable liquid crystal monomer, a photoinitiator and quantum dots; the mass percent of the chiral agent is 3%, the mass percent of the polymerizable liquid crystal monomer is 20-30%, the mass percent of the photoinitiator is 1%, the mass percent of the cross-linking agent is 6%, the mass percent of the quantum dot is 0.1%, and the balance is the micromolecular nematic liquid crystal. According to the blue-phase liquid crystal quantum dot hybrid thin film, the performance of the hybrid thin film in the optical aspect is optimized through the twisting effect of a macromolecular network, and the blue-phase liquid crystal quantum dot hybrid thin film is suitable for flexible display.

The invention relates to the technical field of liquid crystal display, in particular to a blue-phase liquid crystal lens which comprises a blue-phase liquid crystal layer, plane electrodes arranged on the two sides of the blue-phase liquid crystal layer respectively and a round hole electrode provided with a through hole. The semiconductor device further comprises a high-resistance layer, and the outer edge of the high-resistance layer is connected with the inner wall of the through hole. The defect that in the prior art, the imaging quality is reduced due to uneven electric field distribution is overcome, the high-resistance layer is arranged in the round hole structure of a common round hole electrode, the high-resistance layer can be regarded as a plurality of small resistors connected between the electrode and the blue phase liquid crystal layer in series, and applied voltage is divided. The voltage dividing effect of the high-resistance layer enables the electric field to be in smooth transition from the edge of the through hole to the center, the problem that the central electric field is weak is solved, a phase delay distribution curve is closer to an ideal parabola, aberration (such as spherical aberration and coma aberration) is reduced, and finally the imaging quality is improved.

The invention provides a multi-color display structure based on a blue-phase liquid crystal elastomer and a preparation method of the multi-color display structure, and relates to the technical field of liquid crystal elastomers. A first part area, a second part area and a third part area of a first face of a liquid crystal box are subjected to one-time ultraviolet exposure, two-time ultraviolet exposure and three-time ultraviolet exposure respectively; therefore, the areas corresponding to the first part area, the second part area and the third part area in the display structure respectively have different elastic moduli, after the display structure is subjected to tensile deformation, the deformation amount of the area with the higher elastic modulus is smaller, and the central wavelength variation amount is minimum. Therefore, the areas corresponding to the first part area, the second part area and the third part area in the display structure can display different colors. In conclusion, the display structure manufactured through the method can achieve multi-color display and separation, the manufacturing technology is simple, and the performance is stable.